Muffler attachment for telephones.



1. LITT.

MUFFLER'ATTACHMENT FOR TELEPH'ONES.

APPLICATION FILED MAR. 2- 1914.

Patented Apr; 20, 1915.

1 fi l lulllll n l I H I- l m "l m ill l STATES PATENT OFFICE.

JAY LITT, OF PHILADELPHIA, PENNSYLVANIA.

MUFFLER ATTACHMENT FOR TELEPHONES.

To all whom, it may concern: I I

Be it known that I, JAY Lrr'r, a citizen I of the United States, residing at Philadelhia, in the county. of Phi delphia and tateof Pennsylvania, have invented certain new and useful Improvements in Muffier Attachments for Telephones, of which the following is a spfzification.

I y invention rela s to improvements in mu er attachments fdr telephones, the object of the invbntidn being to provide a simple, cheap, anddurable device which may be placed on the transmitter of any telephone, and which-will prevent others in the room from hearing the conversation, while on the other hand, increas ng the -volume of sound for the transmitter, so that it is necessary for the speaker to use but ordinary conversational tonesto be readily understood.

A further object is to provide a device of this character which has a spring clamp to hold itself in position'on the transmitter, which is provided with an improved arrangement of removable ends, rendering the device entirely sanitary as it may be readily cleaned, and provide in the device, a wall or lining of fiber which overcomes anyv tendency of the sound t6 vibrate through the walls of the device.

A further object is to provide an improved device of this character which will conform to the position of the face of the user so that he may use the device with equal comfort with the telephone at any angle.

With these and other objects in view, the

i invention consists in certain novel features of con'structlon and combmatlons and ar- .rangements'of parts as will be more fully hereinafter describedv and pointed out in. the claims In the accompanying drawings: Figure 1 is a view in longitudinal section illustrating my improved device in position on the transmitter of an ordinary desk telephone.

" Fig. 2 is a view incross section on the line 2-2 offFig. 1. Fig. 3 is a view of one end of thedevice, and Fig. 4 is a similar View :of the other end of the device.

' "-fdesk telephone, and 2 the ordinary conical fjl represents a standard of an ordinary transmitter.- My improved mu er comprisesa casing? preferably cylindrical in form and having at its respective ends,

rings 4.- soldered or' otherwise permanently fixed to the ends of the casing.

Specification of Letters Patent.

' Application filed March 2, 1914. Serial No. 821,976.

Patented Apr. 20, 1915.

The rings4 are each provided with screwthreaded extensions 5 to engage screw- .threaded-ends 6 and 7 respectively. The end 6 formed with an opening 8, and around th1s opening 8, a curved spring 9 is secured to the end 6. The ends of the c amp are free as shown at 10 to allow the clamp to-rea-dily position itself on the transmitter.

. The clamp longitudinally of'the device is inclined as shown clearly in Fi 1 to con-- form in shape to the shape 0 the transmitter, and when positioned on'the trans- V mi'tter, the clamp will securely bind an congintute the sole supporting means for the mu er. I

The end 7 is provided with a central opening 11 in which a mouth piece 12 is secured. The mouth piece 12 is circular at its point of juncture with, end 7, and gradually changes its shape to that of an ellipse at its outer end with the upper and lower walls of the ellipse curved so as to snugly fit against the face of the user. i

The head 7 isprovided around themouth piece 12 with a series of relatively smallthe escape of sound. While the disks 15- snugly fitthe ends, the juncture is not air pass through the erforations 13.

In operation, t e speaker places his face close to themouth piece 12 and speaks directly into the same. Using ordinary conversational tones, his voice cannot be heard in the room, yet can be distinctly understood over the telephone.

The spring clamp 9 allows the device to be readily positioned on any telephone without. 1n any way marring or injuring the telephone. Furthermore, the clamps slide tight, hence a certain amount of air'can freely around the transmitter, so that the operator can grasp the, telephone standard 1 and holdit at any angle, as the mufller, will turn on the transmitter, and insure the- .proper positioning of the mouth piece rela-. I

' I claim as new and desire to secure by Lettive to the face regardless ofthean'gle of vention is not limited to the material employed. 7

Various slight changes might be made in the general form and arrangement of parts described Without departing from my in vention, and hence I do not limit'myself to the ,precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claims' Having thus described my 1nventi0n,vvhat ters Patent is 1. In a device of-the character described,

the combination with a cylindricalv casing, of rings secured 'on the ends of the casing and having screw-threaded extensionsa'p preeiably smaller in diameter. than the casmg, removable ends screwed onto said'rings, one of said ends having an opcnlng therein,

andi'amouth piece secured to the endand communicat ng w th the open1ng, theother of said ends having'anopenmg therein, and

a spring clamp secured te the end around the opening, said spring clamp having its ends free, substantially as described.

2. In a device of the character described, the combination with a cylindrical casing, of rings secured on the ends of the casing andfh'avin'g' screw threaded extensions appreciably smaller in diameter than the eas; ing, removable ends screwed onto saidgri n s, one of said ends having an .opening therein, a mouth piece secured to the end and c6 municatingwith the opening, the othe o saidends having an opening therein, an spring clam 21 a secured to the end around opening, said spring clamp disposed'jat angle tothe end andh'aving its ends'ffre', and a lining, of non-conducting manner, ting, the casing and the ends,- onef'of ends having perforations therein: sublet tiallyas described" r t f f "n'y' 'Where'ofI-haye signed lntcsti I name to this spec fication 1n preset two suhscrlbmg' W tnesses? p 

